<template>
  <div class="card__item">
    <van-checkbox
      v-model="checked"
      icon-size="18px"
      :disabled="!disabled"
      :checked-color="variables.theme"
      v-if="isShowCheckbox"
      style="padding: 0 10px 0 16px; background-color: white"
    />
    <van-swipe-cell
      style="width: 100%; background-color: white"
      :before-close="beforeClose"
      :disabled="true"
    >
      <van-card :price="price" :desc="desc" :title="title" :thumb="thumb">
        <template #tags>
          <div v-if="!tagSlot">
            <van-tag
              v-for="(item, idx) in tags"
              :key="idx"
              plain
              type="danger"
              style="margin-right: 4px"
              >{{ item }}</van-tag
            >
          </div>
          <slot v-else></slot>
        </template>
        <template #footer>
          <div v-if="!isShowStep">
            <van-stepper
              v-if="!invalid"
              :value="num"
              :default-value="num"
              button-size="26px"
              :max="maxNumber"
              :min="minNumber"
              integer
              async-change
              @change="onChange"
            />
          </div>

          <!-- <svg-icon icon-class="add-circle" :width="20" :height="20" @click="addNum"/>&nbsp;&nbsp;
          <svg-icon icon-class="minus-circle" :width="20" :height="20" @click="minusNum"/>-->
        </template>
      </van-card>
      <div v-if="time!=''" style="padding: 5px 0 5px 20px;">{{ time }}</div>

      <template #right>
        <van-button square text="删除" type="danger" style="height: 100%" />
      </template>
      <div v-if="invalid" class="invalid">无货</div>
    </van-swipe-cell>
  </div>
</template>

<script>
import variables from "@/styles/variables.scss";
import { changeNumber } from "@/api/cart";
export default {
  model: {
    prop: "isChecked",
  },
  props: {
    time:{
      type: String,
      default: "",
    },
    disabled: {
      type: Boolean,
      default: false,
    },
    isShowStep: {
      type: Boolean,
      default: () => false,
    },
    minNumber: {
      type: [Number, String],
      default: "1",
    },
    index: {
      type: Number,
      default: 0,
    },
    thumb: {
      type: String,
      default: "",
    },
    title: {
      type: String,
      default: "",
    },
    desc: {
      type: String,
      default: "",
    },
    tag: {
      type: String,
      default: "",
    },
    tags: {
      type: Array,
      default() {
        return [];
      },
    },
    originPrice: {
      type: Number,
      default: 0,
    },
    price: {
      type: String,
      default: "",
    },
    num: {
      type: Number,
      default: 0,
    },
    maxNum: {
      type: Number,
      default: 0,
    },
    isChecked: {
      type: Boolean,
      default: false,
    },
    isShowCheckbox: {
      type: Boolean,
      default: true,
    },
    tagSlot: {
      type: String,
    },
    type: {
      type: String,
      default: "",
    },
  },
  data() {
    return {};
  },
  computed: {
    variables() {
      return variables;
    },
    checked: {
      get() {
        return this.isChecked;
      },
      set(val) {
        console.log("val, idx: this.index:", val, this.index);
        this.$emit("input", { val, idx: this.index });
      },
    },
    maxNumber() {
      return this.maxNum > this.num ? this.maxNum : this.num;
    },
    invalid() {
      const valid = this.maxNum < this.num;
      return valid;
    },
  },
  watch: {
    num: {
      handler(n, o) {
        console.log("watch:" + n + " " + o);
      },
    },
    deep: true,
    immediate: true,
  },
  mounted() {
    console.log(
      "id:" + this.index + " maxNum:" + this.maxNum + " curNum:" + this.num
    );
  },
  methods: {
    // position 为关闭时点击的位置
    // instance 为对应的 SwipeCell 实例
    beforeClose({ position, instance }) {
      switch (position) {
        case "cell":
        case "outside":
          instance.close();
          break;
        case "right":
          this.$dialog
            .confirm({
              message: "确定删除吗？",
            })
            .then(() => {
              this.$emit("handleDelete", this.index);
              instance.close();
            })
            .catch(() => {
              instance.close();
            });
          break;
      }
    },
    onChange(value) {
      if (!value) {
        return;
      }
      // 防止重复调用接口
      if (value === this.value) {
        return;
      }
      // 注意此时修改 value 后会再次触发 change 事件
      changeNumber(this.index, value)
        .then((res) => {
          this.curNum = value;
          this.$emit("changeNum", this.index, Number(value));
        })
        .catch();
    },
  },
};
</script>

<style lang="scss" scoped>
.card__item {
  position: relative;
  display: flex;
  flex-direction: row;
  background-color: #f9f8f8;
  padding: 0px 10px 15px 10px;
  .van-card__num {
    font-size: 16px;
  }
}
.van-card__footer {
  position: absolute;
  top: 150px;
  left: -16px;
}
.invalid {
  position: absolute;
  width: 120px;
  height: 120px;
  text-align: center;
  line-height: 120px;
  border-radius: 50%;
  background-color: #554f4f;
  color: white;
  top: 40px;
  left: 60px;
  filter: opacity(80%);
}
</style>
